/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundOutputNode.h
Caused by Output not being able to generate anIOperatorinstance due to the type requiring an input reference (i.e. it is not default constructable).
class FMissingOutputNodeInputReferenceError : public [Metasound::FBuildErrorBase](API\Plugins\MetasoundGraphCore\FBuildErrorBase)